4 Channel PCAOM search

[Phritzler]

Hello!
I search an 4 Channel PCAOM for my project. If someone has something for me, please give me a offer
Greetings,
Phil

[dsli_jon]

Hey Phil...

Hello!
I search an 4 Channel PCAOM for my project. If someone has something for me, please give me a offer

Do you need BOTH a crystal and driver or JUST a 4-Ch Driver? We have an 'old' (but good-condition ) 5W NEOS crystal and
4 Ch Driver that we could probably part-with...

PM-me if ya want more info...

peace...
j

[Laser Ben]

Ya know, considering Phil, I am guessing 5W is not quite enough for him

[Phritzler]

Hello!
For this project,it is enought!
I want only to blank the 3 DPSS lasers in my multicolor bench with this PCAOM.
Greetings,
Phil

[dsli_jon]

Hi Phil...

Hello!
For this project,it is enought!
I want only to blank the 3 DPSS lasers in my multicolor bench with this PCAOM

Got your PM, and thanks for the 'enthusiasm' but I'll answer you here, for the benefit of others possibly wanting to do this, too...

Potential problem you will have is polarization. Depending on how each of your DPSS's are polarized, you may get somewhere between 'so-so' to 'horrible' results, in-terms-of power transmission-efficiency (ie: say you have 1W total (combined, all-lines) laser power, well, unless the polarization of all 3 lasers is matched (ie ALL vertical, or ALL horizontal, etc), and you 'match' that 'angle' with your PCAOM-
mount, you might get 100-200mW out, TOPS of even a 'properly-tuned' PCAOM...) - And I am guessing a 'useable' 10-20% of your lasers' power is not what you had in mind! ...Yeah, polarization can be a 'biotch'...

Unless you already know, (and certainly, the laser manufacturer SHOULD BE able to tell you IF / HOW they are polarized )
I *believe* you should be able to determine how your lasers are polarized with THIS method... since I can't really explain it any better, best to just post the link...

...Besides, how cool is that 'o-Tool'?! (at the end of the article) I know what is on my next 'toy wish list'...

But, umm, I wanna ask this 'delicately' (I don't want to sound 'challenging' or offensive in any way...) why do you want to use a PCAOM? Why are you not just 'blanking' these solid-state lasers with either TTL - or, best - analog signals? Are they, for some strange reason, not 'blanking' capable?? Certainly, in all respects that I can think of, THAT is definitely the BEST way to blank DPSS lasers vs a PCAOM. ...More info, please!

Anyhoo, hope this helps... lemme know once you either determine how they are polarized and/or the answer to the last question, there...

peace..
j

[Phritzler]

Hello!
I know that the lasers must be polarized to get small losses, if the lasers are´t polarized, you have ~60% "lost".
I want to use PCAOM, becouse If I blank the DPSS directly I have more power loss, have no good linearity, and I have grindeling. That´s the fact
Greetings,
Phil

[dsli_jon]

Hi Phil -

Hello!
I know that the lasers must be polarized to get small losses, if the lasers are´t polarized, you have ~60% "lost"

Yes, or worse! Typically, with a polarity-matched gas laser, best you get is 70-80% 'efficiency' (~20% loss) but I have seen HUGE losses (>80% 'lost') in my own DPSS experiments, even-with supposedly 'polarized' lasers...

I want to use PCAOM, becouse If I blank the DPSS directly I have more power loss, have no good linearity, and I have grindeling. That´s the fact

Yes, I see where you are coming from...Well, while I do think that there are other good 'solutions' to your issues, there, I'm not trying to 'discourage' you from 'going PCAOM', but just wanna make sure you have a 'realistic' perspective...

Do you know / can you find out HOW your lasers are polarized? (H or V or XX˚ or H+V or ???, etc) ...The Manuf. should be able to give you those specs... Failing that, you could try the 'tests' listed on that link.. Determining this will still be important, so you can determine the best-way to combine them for max-power IN, and best mounting-block angle for your PCAOM... Do you need a bragg-mount as-well?

Forgive me if you already know all this, and I am just annoying you with these suggestions, but I just wanna make sure you know,
not just 'sell you something'... Cool?

lemme know..
j

[Phritzler]

Hello!
All the DPSS have the same polarisation (100:1, so no really loss, only 1%) and H-polarized.
It´s no problem for the PCAOM , becouse I must only check how I must mount, the only think is that I must mount at 90 Degree or something, but that isn´t a problem.
I know what I want haha
Greetings,
Phil

[dave]

One thing to bear in mind with the Neos 4ch driver is the channel frequencies are preset via a oscillator module. To change the frequency, you need to change the oscillator..

[allthatwhichis]

Might as well go 8 channel...